Dr. Ran Guan, MD, MS
- Medicare services, 2024
- 853
- Medicare patients, 2024
- 328
- Part D claims, 2024
- 557
- Hospital affiliations
- 4
- Industry payments
- $49
- Practice address
- 975 Port Washington Road, Grafton, WI 53024
- Practice phone
- Call (262) 329-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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Dr. Ran Guan is a hospitalist in Grafton, Wisconsin
Dr. Guan practices at Aurora Medical Center - Grafton in Grafton, Wisconsin, part of Advocate Health.
Dr. Guan's NPI, 1275774192, was assigned on March 23, 2009. Dr. Guan holds Wisconsin license 54599020.
- NPI
- 1275774192NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2769638246
- NPI enumeration date
- March 23, 2009
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (262) 329-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 58
- Medical school graduation
- 1994
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Ran Guan practices at Aurora Medical Center - Grafton in Grafton, Wisconsin
Dr. Guan's primary practice is Aurora Medical Center - Grafton, at 975 Port Washington Road, Grafton, WI 53024 in Ozaukee County. The practice phone is (262) 329-1000.
- Aurora Medical Center - Grafton975 Port Washington Road, Grafton, WI 53024 · Ozaukee CountyPhone(262) 329-1000
Source: Dmand AI Affiliation Data
Dr. Ran Guan is affiliated with 5 sites of care and 1 medical group
Dr. Guan's primary practice is Aurora Medical Center - Grafton in Grafton, Wisconsin, part of Advocate Health. Dr. Guan is also affiliated with Aurora St. Luke's Medical Center. The medical group on file is Aurora Medical Group. Dmand AI also links Dr. Guan to 2 more hospitals and 1 hospital outpatient department, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Ran Guan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Guan practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Aurora Medical Center - Grafton | Available with a free account |
| +4 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Ran Guan is one of 773 hospitalists in Wisconsin
Hospitalist is Dr. Guan's primary specialty in the NPI Registry, under taxonomy code 208M00000X. Dr. Guan is licensed in Wisconsin.
Specialties and state licenses
- Hospitalist, WisconsinPrimary
Hospitalists near Dr. Guan
Counts of hospitalists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Ran Guan billed Medicare for 853 services in 2024
CMS data shows 853 Medicare services from Dr. Guan across 4 procedure codes in 2024, for 328 Medicare patients. Medicare paid $69,185 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Guan's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 9422024: 8539%
Dr. Guan compared with the Wisconsin median for hospitalists, 2024
- Dr. Guan
- Wisconsin median
- Medicare services
- 853vs 3572.4 times
- Medicare patients
- 328vs 16599% above
- Part D claims
- 218vs 782.8 times
Medians across 743 hospitalists in Wisconsin with Dmand AI profiles that report each measure.
Dr. Guan's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Ran Guan treated 328 Medicare patients in 2024, average age 78
CMS counts 328 Medicare patients who saw Dr. Guan in 2024. The largest group is 75 to 84, with 118 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 16% are also on Medicaid. Their average risk score is 2.34, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Guan's median patient age at 77, with 55% women.
Dr. Guan's Medicare patients by age, 2024
Dr. Guan's Medicare patients by sex, 2024
- Women18356%
- Men14544%
Chronic conditions among Dr. Guan's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis61%
- Chronic kidney disease52%
- Heart failure48%
- Ischemic heart disease47%
- Mood disorders41%
- Anxiety40%
Share of Medicare patients with each condition. A patient can have several.
Dr. Guan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 77
Patient panel by sex, all payers
- Women55%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Ran Guan wrote 557 Medicare Part D claims in 2024
In 2024, Dr. Guan wrote 557 Medicare Part D claims for 231 patients. 87% of them were for generic drugs. CMS names the drug for 218 of them, across 11 drugs with 11 or more claims each, at $1,494 in total drug cost. In 2023, CMS named 194 claims across 10 drugs.
Dr. Guan's Part D claims by kind of drug, 2024
- Generic487 claims87%
- Brand-name and other70 claims13%
Dr. Guan's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Guan's Part D claims, 2024
- Opioids5%29 of 557 claims
- Antibiotics19%108 of 557 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1942024: 21812%
Drugs named by CMS: 11 in 2024, 10 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Ran Guan offers telehealth to Medicare patients
Dr. Guan accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Guan as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Ran Guan received $49 in industry payments in 2023
CMS Open Payments shows 3 general payments to Dr. Guan from 1 drug or device company in 2023. Food and beverage make up the largest share, 100% of the total. Abbvie Inc. paid the most, $49.
Companies that paid Dr. Guan the most, 2023 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Ran Guan's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Ran Guan
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Ran Guan's NPI number?
Dr. Ran Guan's NPI number is 1275774192. It was assigned on March 23, 2009, and it is active in the NPI Registry.
What kind of doctor is Dr. Ran Guan?
Dr. Ran Guan is a hospitalist in Grafton, Wisconsin. The primary specialty in the NPI Registry is Hospitalist Physician (taxonomy code 208M00000X).
Where does Dr. Ran Guan practice?
Dr. Guan practices at 975 Port Washington Road, Grafton, WI 53024. Dr. Guan's primary practice is Aurora Medical Center - Grafton in Grafton, Wisconsin, part of Advocate Health. Dmand AI also links Dr. Guan to 2 hospitals and 1 hospital outpatient department.
What is Dr. Ran Guan's office phone number?
The practice phone on file for Dr. Guan is (262) 329-1000.
What is Dr. Ran Guan's medical license number?
Dr. Guan holds Wisconsin license 54599020.
Which hospitals is Dr. Ran Guan affiliated with?
Dr. Guan practices at Aurora Medical Center - Grafton in Grafton, Wisconsin. Dr. Guan is also affiliated with Aurora St. Luke's Medical Center. Dmand AI links Dr. Guan to 2 more hospitals.
What medical group is Dr. Ran Guan part of?
Dr. Guan is linked to Aurora Medical Group.
Does Dr. Ran Guan accept Medicare?
Yes. CMS data shows Dr. Guan billed Medicare for 853 services in 2024, and Dr. Guan accepts Medicare assignment.
Does Dr. Ran Guan offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Guan as offering telehealth services.
How many Medicare patients does Dr. Ran Guan see?
CMS counts 328 Medicare patients who saw Dr. Guan in 2024, with an average age of 78.
Show 4 more questionsShow fewer questions
What services does Dr. Ran Guan bill to Medicare?
In 2024, Dr. Guan's most billed Medicare services were hospital inpatient care (99233), hospital inpatient care (99232) and hospital inpatient care (99239).
What drugs does Dr. Ran Guan prescribe most?
In 2024 Medicare Part D data, Dr. Guan's most prescribed drugs by claims were Furosemide, Amoxicillin-Clavulanate Potass and Pantoprazole Sodium.
Has Dr. Ran Guan received payments from drug or device companies?
CMS Open Payments shows $49 in general payments to Dr. Guan from 1 company from 2023 to 2023. The largest total came from Abbvie Inc.
How long has Dr. Ran Guan been practicing?
Dr. Guan graduated from medical school in 1994, 32 years ago.
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